From owner-freebsd-current@FreeBSD.ORG Fri Oct 12 04:01:48 2007 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C986116A419; Fri, 12 Oct 2007 04:01:48 +0000 (UTC) (envelope-from peter@wemm.org) Received: from overcee.wemm.org (overcee.wemm.org [IPv6:2001:5a8:4:2140::3]) by mx1.freebsd.org (Postfix) with ESMTP id 78BDA13C455; Fri, 12 Oct 2007 04:01:48 +0000 (UTC) (envelope-from peter@wemm.org) Received: from overcee.wemm.org (localhost [127.0.0.1]) by overcee.wemm.org (8.14.1/8.14.1) with ESMTP id l9C41mq9056906; Thu, 11 Oct 2007 21:01:48 -0700 (PDT) (envelope-from peter@wemm.org) Received: from localhost (localhost [[UNIX: localhost]]) by overcee.wemm.org (8.14.1/8.14.1/Submit) id l9C41mSg056905; Thu, 11 Oct 2007 21:01:48 -0700 (PDT) (envelope-from peter@wemm.org) X-Authentication-Warning: overcee.wemm.org: peter set sender to peter@wemm.org using -f From: Peter Wemm To: freebsd-current@freebsd.org Date: Thu, 11 Oct 2007 21:01:47 -0700 User-Agent: KMail/1.9.6 References: <200710111741.34992.jhb@FreeBSD.org> <622950DD-BFEF-450C-8B80-BAB55C7B58CB@mac.com> In-Reply-To: <622950DD-BFEF-450C-8B80-BAB55C7B58CB@mac.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200710112101.48119.peter@wemm.org> Cc: Marcel Moolenaar , current@freebsd.org Subject: Re: New-bus unit wiring via hints.. X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Oct 2007 04:01:48 -0000 On Thursday 11 October 2007, Marcel Moolenaar wrote: > On Oct 11, 2007, at 2:41 PM, John Baldwin wrote: > > 2) One of the things this fixes that is visible to users is that if > > your > > machine gets the COM ports backwards when using ACPI it should > > now get > > them correct (COM1 as sio0) assuming your COM ports use the > > default hints > > and you have the default sio hints in your /boot/device.hints > > file. > > I think you just pointed out the problem of using hints to wire > down unit numbers, because hints will stop hinting and will start > dictating. If I swap the serial ports in the BIOS then surely > my hints will be wrong and ACPI will be right. Not necessarily. It has been a long standing problem that ACPI is wrong (or sub-optimal) about serial ports. There are many machines that list 0x2f8 first, and 0x3f8 second. As a result, we bind sio0 to com2, and sio1 to com1. I like the way John did it. It reserves the unit numbers for hardware that matches the hints. For example, sio0 may be reserved for a com port that is found that had 0x3f8. If nothing has 0x3f8, then sio0 won't be created. > A default hints > file will be even more disastrous than before. -- Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com "All of this is for nothing if we don't go to the stars" - JMS/B5